WE03		10min1:59

G. DUXBURY, G. RITCHIE, Department of Physics and Applied Physics, Strathclyde University, Glasgow G4 0NG,Scotland,UK; R. A. BANNAI, Department of Physics, University of Bahrain, PO. Box: 32038, Bahrain; S. KLEE, Physikalisch-Chemisches Institute der Justus-Liebig Universität, D-6300 Giessen, Germany.

A first full rotational analysis of high resolution gas phase spectra of the lowest frequency fundamental bands, ₉ and ₁₂, of formaldoxime, CH₂NOH, has been completed. In addition the weak ₇ fundamental has been analysed at medium resolution, and the complex structure of the bands in the ₁₁ and 2₁₂ region has been revealed. It is shown that the complexity of the spectrum of the latter region is due to Coriolis interaction between the overtone 2₁₂ and the fundamental band ₁₁. The region covered in this analysis is from 8-30 µm. Since the molecule has Cs symmetry, in principle all the bands of A' symmetry are AB hybrids. Although the ₄, ₅, ₆, and ₈ fundamental bands described previously are predominantly A type, the ₇ band is found to be almost a pure B-type band. The ₁₁ and ₁₂ bands are C-type bands . The band origins (cm^-1) are ₇ 1157.282 ₉ 530.01785 ₁₁ 772.78, ₁₂ 397.68499 and 2₁₂ 778.517.